Isabela is the second largest province of the Philippines

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

 next to Palawan

Palawan

Palawan is an island province of the Philippines located in the MIMAROPA region or Region 4. Its capital is Puerto Princesa City, and it is the largest province in the country in terms of total area of jurisdiction. The islands of Palawan stretch from Mindoro in the northeast to Borneo in the...

. It is located in the Cagayan Valley

Cagayan Valley

Cagayan Valley is a region of the Philippines, also designated as Region II or Region 02. It is composed of five provinces, namely: Batanes, Cagayan, Isabela, Nueva Vizcaya, and Quirino...

 Region

Regions of the Philippines

In the Philippines, regions are administrative divisions that serve primarily to organize the provinces of the country for administrative convenience. Currently, the archipelagic republic of the Philippines is divided into 17 regions...

 in Luzon

Luzon

Luzon is the largest island in the Philippines. It is located in the northernmost region of the archipelago, and is also the name for one of the three primary island groups in the country centered on the Island of Luzon...

. Its capital is Ilagan

Ilagan, Isabela

Ilagan is a 1st-class municipality in the province of Isabela, Philippines. It is the capital municipality and the largest town of Isabela...

 and borders, clockwise from the south, Aurora, Quirino

Quirino

Quirino is a province of the Philippines located in the Cagayan Valley region in Luzon. Its capital is Cabarroguis and was named after Elpidio Quirino, the sixth President of the Philippines. The province borders Aurora to the southeast, Nueva Vizcaya to the west, and Isabela to the north...

, Nueva Vizcaya

Nueva Vizcaya

Nueva Vizcaya is a province of the Philippines located in the Cagayan Valley region in Luzon. Its capital is Bayombong. It is bordered by, clockwise from the north, Ifugao, Isabela, Quirino, Aurora, Nueva Ecija, Pangasinan, and Benguet.-History, people and culture:The name was derived from the...

, Ifugao

Ifugao

Ifugao is a landlocked province of the Philippines in the Cordillera Administrative Region in Luzon. Covering a total land area of 262,820 hectares, the province of Ifugao is located in a mountainous region characterized by rugged terrain, river valleys, and massive forests...

, Mountain Province

Mountain Province

Mountain Province is a landlocked province of the Philippines in the Cordillera Administrative Region in Luzon. Its capital is Bontoc and borders, clockwise from the south, Ifugao, Benguet, Ilocos Sur, Abra, Kalinga, and Isabela.Mountain Province is sometimes incorrectly named Mountain in some...

, Kalinga, and Cagayan

Cagayan

Cagayan , the "Land of Smiling Beauty", is a province of the Philippines in the Cagayan Valley region in Luzon. Its capital is Tuguegarao City and is located at the northeastern corner of the island of Luzon. Cagayan also includes the Babuyan Islands to the north. The province borders Ilocos Norte...

. This primarily agricultural province

Province

A province is a territorial unit, almost always an administrative division, within a country or state.-Etymology:The English word "province" is attested since about 1330 and derives from the 13th-century Old French "province," which itself comes from the Latin word "provincia," which referred to...

 is the rice

Rice

Rice is the seed of the monocot plants Oryza sativa or Oryza glaberrima . As a cereal grain, it is the most important staple food for a large part of the world's human population, especially in East Asia, Southeast Asia, South Asia, the Middle East, and the West Indies...

 and corn

Maize

Maize known in many English-speaking countries as corn or mielie/mealie, is a grain domesticated by indigenous peoples in Mesoamerica in prehistoric times. The leafy stalk produces ears which contain seeds called kernels. Though technically a grain, maize kernels are used in cooking as a vegetable...

 granary of Luzon

Luzon

Luzon is the largest island in the Philippines. It is located in the northernmost region of the archipelago, and is also the name for one of the three primary island groups in the country centered on the Island of Luzon...

 due to its plain and rolling terrain.
Prior to 1856, there were only two provinces in the Cagayan Valley Region: Cagayan

Cagayan

Cagayan , the "Land of Smiling Beauty", is a province of the Philippines in the Cagayan Valley region in Luzon. Its capital is Tuguegarao City and is located at the northeastern corner of the island of Luzon. Cagayan also includes the Babuyan Islands to the north. The province borders Ilocos Norte...

 and Nueva Vizcaya

Nueva Vizcaya

Nueva Vizcaya is a province of the Philippines located in the Cagayan Valley region in Luzon. Its capital is Bayombong. It is bordered by, clockwise from the north, Ifugao, Isabela, Quirino, Aurora, Nueva Ecija, Pangasinan, and Benguet.-History, people and culture:The name was derived from the...

.