Abstract
Shifting cultivation of dryland rice is still practiced by indigenous Kalimantan people to fulfill their own needs for rice. The selected locations are mainly young secondary forest land cover with a fallow period of 10-15 years for easier work and higher biomass. The stage of shifting cultivation that most determines the ease of subsequent activities, growth and yield is the amount of biomass burned (>70%) to ash, except for parts of trees >15cm in diameter. Ash contains available macro and micro nutrients that can increase nutrient retention (nr), namely CEC, base saturation and pH and available nutrients (na) N, P and K. Assessment of land suitability to the requirements of growing field rice with the matching method, that the minimum land characteristics are the heaviest constraints that determine the class and sub-class land suitability. The evaluation results obtained actual land suitability sub-class S3nr,na, the heaviest limiting factors of nutrient retention and nutrient availability. Improvement of biomass ash after land burning occurs naturally starting with rain. Improvement of limiting factors is naturally limited, farmers must add N and P nutrients from Urea and Super Phosphate-36 (SP-36) fertilizers at doses of N 25-40 kg.ha-1 and P 30-50 kg.ha-1. Fertilizers are applied by sowing at 21 days of age and 45 days of age at a dose of 50% each. After the improvement efforts were made, the growth of field rice was better so that production increased. The sub-class of suitability increased one level to S2eh,nr, the limiting factors are slope class (eh) and nr.
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Claims 4
Claim · model-written summary
Actual land suitability for field rice is sub-class S3nr,na, limited by nutrient retention and nutrient availability.
Verbatim
e1“Assessment of land suitability to the requirements of growing field rice”
e2“The evaluation results obtained actual land suitability sub-class S3nr,na, the heaviest limiting factors of nutrient retention and nutrient availability”
Claim · model-written summary
Fertilizer improvement raised the field rice land suitability sub-class one level to S2eh,nr.
Verbatim
e1“Assessment of land suitability to the requirements of growing field rice”
e2“The evaluation results obtained actual land suitability sub-class S3nr,na, the heaviest limiting factors of nutrient retention and nutrient availability”
e3“farmers must add N and P nutrients from Urea and Super Phosphate-36 (SP-36) fertilizers at doses of N 25-40 kg.ha-1 and P 30-50 kg.ha-1”
e4“The sub-class of suitability increased one level to S2eh,nr, the limiting factors are slope class (eh) and nr”
Claim · model-written summary
After fertilizer improvement, field rice production increased.
- Taxon
- field ricee1
- Treatment
- N and P nutrients from Urea and Super Phosphate-36 (SP-36) fertilizerse3
- Outcome
- productione5
- Direction
- increasede5
Not reportedComparator
Verbatim
e1“Assessment of land suitability to the requirements of growing field rice”
e3“farmers must add N and P nutrients from Urea and Super Phosphate-36 (SP-36) fertilizers at doses of N 25-40 kg.ha-1 and P 30-50 kg.ha-1”
e5“After the improvement efforts were made, the growth of field rice was better so that production increased”
Claim · model-written summary
After fertilizer improvement, the growth of field rice was better.
- Taxon
- field ricee1
- Treatment
- N and P nutrients from Urea and Super Phosphate-36 (SP-36) fertilizerse3
- Outcome
- growth of field ricee5
- Direction
- bettere5
Not reportedComparator
Verbatim
e1“Assessment of land suitability to the requirements of growing field rice”
e3“farmers must add N and P nutrients from Urea and Super Phosphate-36 (SP-36) fertilizers at doses of N 25-40 kg.ha-1 and P 30-50 kg.ha-1”
e5“After the improvement efforts were made, the growth of field rice was better so that production increased”
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