Fundamentals of Horticulture

Planting Systems

Square system It is the most commonly used method and easy to layout in the field. In this system, plant to plant and row to row distance is the same. The plants are at the right angle to each other, every unit of four plants forming a square. This system facilitates the interculture in two directions after the orchard is planted. Advantages Most easy and popular one. In this row to row and plant to plant distance is kept similar. Plants are exactly at right angle to each other. Interculture operations can be done in both the directions. Adequate space for inter-cultivation of remunerative crops like vegetables.
Rectangular system In this system, the plot is divided into rectangles instead of squares and trees are planted at the four corners of the rectangle in straight rows running at right angles. Like square system, this system also facilitates the interculture in two directions. The only difference is that in this system more plants can be accommodated in the row keeping more space between the rows. Advantages Lay out in rectangular shape. More space between row to row. Inter-cultural operations can be done in both the ways. Plants get proper space and sunlight.
Hexagonal system In hexagonal system, the trees are planted in the corners of equilateral triangles. Six trees thus form a hexagon with another tree at its centre. This system, though a little difficult for execution but accommodates 15 percent more plants. Cultivation of land between the tree rows is possible in three directions with this system. This system is generally followed where the land is costly and very fertile with ample provision of irrigation water. Advantages Accommodates 15 % more plants than the square system. Plants are planted at the corner of equilateral triangle. Six trees are planted making a hexagon. The seventh tree is planted in the centre and called septule. This requires fertile land. Disadvantage Lay out is difficult and cumbersome.
Quincunx system This system is exactly like the square system but one additional tree is planted in the centre of each square. The number of plants per acre by this system is almost doubled than the square system. Fruit trees like papaya, kinnow, phalsa, guava, peach, plum etc. can be planted as fillers in the permanent trees provides an additional income to the grower in the early life of the orchard. The filler trees are uprooted when the main orchard trees start commercial fruiting.
Contour system This system is usually followed in the hilly areas with high slopes but it is very much similar to the square/rectangular system. Under such circumstances, the trees may be well planted in lines following the contour of the soil with only a slight slope. Irrigation and cultivation are then practiced only across the slope of the land as this practice reduces the chances of soil erosion. In this system layout is done as in square/rectangular system, first by establishing the base line at the lowest level and then marking for the trees should be done from the base to the top. Bench terraces are used where the slope is greater than 10 per cent.
Triangular system In this system, trees are planted as in the square system but the plants in the 2nd, 4th, 6th and such other alternate rows are planted midway between the 1st, 3rd, 5th and such other alternative rows. This system provides more open space for the trees and for intercrop.