Abstract
Normal 0 false false false IN X-NONE X-NONE Dry land is one of land resources which potentially used for food crop cultivation, especially in the areas which have light to medium technical obstacles. The development of technology to improve soil quality in marginal lands to be productive lands is still widely open for agricultural development in Indonesia. Rooting medium quality can be improved by changing soil tillage method and observing the proper crop irrigation technology. It can be the solution for crop cultivation in clay loam soil. This study aimed to obtain water movement model in a minimally-tilled clay soil with strip shallow irrigation. The concept is limited soil-tillage with strip shallow irrigation method, water supply technique, and crop water requirement. Method used in this study includes developing water movement model (software development) in a minimally-tilled clay soil with subsurface irrigation. In the final stages, research also conducted water movement analysis testing apparatus in the laboratory, field validation of the subsurface irrigation performance, and cultivation technique testing to chili pepper growth (Capsicum annuumL.). The development of water movement simulation on a limited strip-tillage with subsurface irrigation uses the concept to quantify the amount of water in the soil. The analysis of movement pattern was demonstrated on contour patterns. It showed that the wetting process can reach depth zone – 5 cm to the rooting zone. It was an important discovery on the development of minimum stripe tillage soil with subsurface irrigation. Specifically, it can be concluded that: the result of fitting by eyes to diffusivity graphic and water content obtained the required parameter values for soil physical properties. It was then simulated on horizontal water movement model on a minimum strip-tillage with strip shallow irrigation /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}
Highlights
Conventional soil tillage in its application in the field eventually results in more works than minimum tillage (Kelly et al, 1996)
Soil tillage is an alternative which can help solving the problems in marginal areas with clay loam texture, other alternatives should be considered in the selection of land irrigation technology
By selecting several irrigation technology alternatives, it is found that subsurface irrigation is more appropriate for marginal lands or clay loam soil
Summary
Conventional soil tillage in its application in the field eventually results in more works than minimum tillage (Kelly et al, 1996). Strip-tillage provides supportive environment for planting seeds in a row (Janovick et al, 2006) It helps increasing infiltration velocity (Mukhtaret et al., 1985), as well as improving water availability for crops along the root zone and water recharge (Trouse 1983). Soil tillage is an alternative which can help solving the problems in marginal areas with clay loam texture (podzolic), other alternatives should be considered in the selection of land irrigation technology. Limited soil tillage cultivation is developed to striptillage with subsurface irrigation only for seasonal crop cultivation. It can be applied as the alternative of marginal land utilization. The study aimed to: obtain the combination of soil texture and the addition of organic matter to water availability, study the management of soil moisture in the root zone and analyze the experimental design compare to soil physics concepts
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