Study of the results of organic fertilizers on changes in soil nutrient content of experimental
organic riceberry rice planted in the organic field (Block C), responsible area of agronomy farm,
agronomy field. Agriculture Committee Mae Jo University with Randomized Complete Block Design:
RCBD has 3 iterations, 6 methods (experiments), method 1, no fertilizer use (Control), method 2,
composting organic fertilizer from cow manure, method 3 . Add organic fertilizer, compost from
chicken manure. Method 4 Add organic fertilizer, compost from pellets. ( Ready- made organic
fertilizers) Method 5 Compost organic fertilizers from cow manure. (Ready-made organic fertilizers)
Method 6: Add chemical fertilizers with formula 46-0-0 and fertilizer formula 16-20-0, which will be
divided into 2 times at the age of 40 and 70 days. The results showed that the 4 application of organic
fertilizers fermented from pellet chicken droppings of Annona brand resulted in riceberry rice. Has the
best growth and the highest yield. This may be because the aforementioned organic fertilizers is a pellet
form of organic fertilizers. Which the production process needs to digest the fertilizer to be as small as
possible to be able to form pellets Adding this type makes rice can absorb such fertilizers better than
other fertilizers. As for the analysis of soil nutrient content, it was found that soil samples in the plots
from local cow manure composting (T2) showed the highest increase in organic matter content. This
may be because organic manure compost takes more time to decompose than other types of organic
fertilizers. Therefore, the remaining residue in the soil more than other types of organic fertilizers.